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Edit: (Not a duplicate) This question is not related to another question on the forum, this is related also to android 4.3 jelly bean, and furthermore I have provided my serial number of Galaxy S4, so read the question fully.
I have a Samsung Galaxy S4 i9300XXUAMDK, and I still have 4.2.2 Jelly Bean. I don't understand why I am not even getting the 4.3 Jelly Bean update when 4.4 KitKat is rolling out for Samsung S4. Does someone have any clue?